🤔 How to play
- Nine tiles sit in a grid on a wooden table, three across and three down, but the bottom-right one is missing. That empty space is the gap. The answer tiles wait in a tray in front.
- A row goes across. A column goes down. Look at what changes along each row and down each column: the shape, the colour, how many shapes there are, or how big they are.
- Work out what the missing tile must look like, then find it in the tray. Only one tile fits the gap.
- The first puzzles have one rule. Later ones have two, then three. Every puzzle was checked by computer, so there is always exactly one right tile.
Controls
- Touch or mouse: tap a tile to pick it up, then tap it again, or tap the gap, to place it. Or drag a tile straight into the gap.
- Keyboard: the arrow keys move along the answer tiles and Enter places the picked one in the gap. H or 💡 gives a hint, one step at a time; the last hint names the answer. G reads the whole puzzle out for a screen reader.
A wrong tile greys out and explains itself ("Look at the colour: each row has its own colour"), so every miss teaches the rule, and the right tile settles into the gap while your helper cheers. Nothing is saved: ticks and stars for finished levels last only this visit.
What it practises
Matrix reasoning: spotting what changes along the rows and down the columns, then finding the tile that fits. It is the shape of puzzle used in non-verbal reasoning papers, but this is practice, not a test: nothing is scored and nothing is saved.
Missing Tile